The chart above shows the distribution of letter grades for three groups of students on one test. Point values are assigned to the letter grades so that A = 4 points, B = 3 points, C = 2 points and D = 1 point. Which of the following values is the closest to the average (arithmetic mean) grade of students in the group 3?

A. 2.2B. 2.4C. 2.9D. 3.1E. 3.6

(B) There are 4 + 7 + 9 + 2 = 22 students in the group 3.

The grade distribution in the group 3 was:4 students received D;7 students received C;9 students received B;2 students received A.

We can find the average grade in gr the group 3 by dividing this sum by the number of students in the group 3:Average for the group 3 = 53/22.Performing the required division, we see that 2.4 is the closest answer choice.

The correct answer is choice (B).----------I did not understand the question, could you please elaborate. Which groups are we talking about?

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